Shimano GRX RD-RX817 11 Speed Rear Derailleur Rotor Size_203mm Compatible with Zwift and other

Compatible with Zwift and other indoor cycling apps

PFC-free DWR finish prevents water infiltration

Reusable and recyclable

Benefit: Sweat wicking

MAGURA Royal Blood mineral oil does away with the need for changing the brake fluid and puts mechanical wear and tear in the past

Shimano GRX RD-RX817 11 Speed Rear Derailleur Rotor Size_203mm Compatible with Zwift and otherShimano GRX RD RX817 11 Speed Rear Derailleur With an integrated chain stabilizer mechanism, the Shimano GRX derailleur provides a quieter experience and shifting security and precision on mixed terrain. For rides on smooth surfaces, the derailleur features and On Off switch for the chain tensioner. The RD RX817 Di2 version offers the digital precision of Shimano electronic shifting and synchronized shifting and is compatible with MTB cassettes with a